diff --git a/VPet-Simulator.Core/Graph/PNGAnimation.cs b/VPet-Simulator.Core/Graph/PNGAnimation.cs
index d7e6aa4..1d77317 100644
--- a/VPet-Simulator.Core/Graph/PNGAnimation.cs
+++ b/VPet-Simulator.Core/Graph/PNGAnimation.cs
@@ -85,6 +85,15 @@ namespace VPet_Simulator.Core
                 return;
             }
             var paths = p.GetFiles("*.png");
+            if (paths.Length == 0)
+            {
+                return;
+            }
+            else if (paths.Length == 1)
+            {
+                Picture.LoadGraph(graph, paths[0], info);
+                return;
+            }
 
             bool isLoop = info[(gbol)"loop"];
             PNGAnimation pa = new PNGAnimation(graph, path.FullName, paths, new GraphInfo(path, info), isLoop);
diff --git a/VPet-Simulator.Core/Graph/Picture.cs b/VPet-Simulator.Core/Graph/Picture.cs
index c7c5c6e..6cbecfc 100644
--- a/VPet-Simulator.Core/Graph/Picture.cs
+++ b/VPet-Simulator.Core/Graph/Picture.cs
@@ -45,6 +45,8 @@ namespace VPet_Simulator.Core
                 PNGAnimation.LoadGraph(graph, path, info);
                 return;
             }
+            if (path.Extension != ".png")
+                return;
             int length = info.GetInt("length");
             if (length == 0)
             {